JP2007096650A - Digital broadcast receiver and its screen display method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a digital broadcast receiver with which a data broadcast can comfortably be viewed, and its screen display method. <P>SOLUTION: A document containing a specified keyword is retrieved from a series of BML documents included in a signal of the received data broadcast and when the document containing the keyword is detected, a screen of the data broadcast generated based upon the document is displayed together with a program screen of the digital broadcast. Consequently, the screen of the BML document containing the specified keyword is selected from the series of BML documents sent with the data broadcast and displayed, so that, for example, even when only the television broadcast is viewed while the screen of the data broadcast is not displayed, the disadvantage that a viewer misses useful information of the data broadcast is reducible. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a digital broadcast receiving apparatus and its screen display method, and more particularly to display of data broadcast in digital broadcast.

  In recent years, mobile terminals typified by mobile phones have undergone significant technological innovation, and various functions such as data communication via the Internet, games, music players, cameras, and the like can be mounted. Recently, mobile phones with built-in TV broadcast reception tuners have appeared and are attracting attention (see Patent Document 1).

  On the other hand, since television broadcasting is scheduled to shift from a conventional analog system to a digital system, development of devices equipped with digital broadcast reception tuners is also being actively promoted in mobile phones.

Also, what you are interested in and what you want to see can be input in the form of words, video, and audio, and the broadcast contents of all channels being received by pressing the search key or information on the communication line Can be analyzed, searched, and displayed (see Patent Document 2).
Japanese Patent Laid-Open No. 2002-9920 JP 2002-135673 A

  Digital broadcast waves can transmit data broadcast signals in addition to television video signals and audio signals. Data broadcasting provides viewers with various types of information related to digital broadcasting programs using characters, images, and the like. In data broadcasting, for example, it is possible to display information such as a player's score by a viewer's operation while watching a baseball program.

  By the way, the screens constituting the data broadcast are hierarchized, and the link displayed on the screen is selected to shift to the next screen. Therefore, when there are many links, it takes time for the viewer to confirm all the contents of the data broadcast.

  Further, since a BML (broadcast markup language) document designated as a start-up document must be displayed first for data broadcasting, it is inconvenient because it is not possible to immediately switch to that page when the place to be viewed is known.

  Further, even if the viewer receives the data broadcast update notification and displays the data broadcast, the information is not necessarily necessary for the viewer. Furthermore, if the frequency of update notifications is high, the viewer cannot concentrate on the program. If the update notification is not displayed, information necessary for the viewer may be missed.

By the way, in a small device such as a mobile phone, the screen size of the display cannot be increased so much. For example, if a television broadcast and a data broadcast are simultaneously displayed, the display area becomes narrow and it is difficult to see the video. Inconvenience occurs.
In order to widen the display area of the intended audience, if only one display is made or one display is made smaller, data broadcasting that provides various information in conjunction with a television broadcast program The superior quality is impaired.

  The present invention has been made in view of such circumstances, and an object of the present invention is to provide a digital broadcast receiving apparatus and a screen display method thereof that can comfortably view a data broadcast even when the display screen is small.

  A broadcast receiving apparatus according to a first aspect of the present invention includes a registration unit for registering a keyword, a reception unit for receiving a digital broadcast, and a registration for a data broadcast performed by the digital broadcast received by the reception unit. And a control means for performing a notification control when the keyword is included in the data broadcast.

  The control means may display the contents of the data broadcast including the keyword together with the digital broadcast video.

  The control means may display a page including the keyword on a data broadcast screen together with a digital broadcast video.

  The control means may display a part of a page including the keyword superimposed on a digital broadcast video.

  The control means may notify that the keyword is included in the data broadcast by the light emission means or the vibration means.

  The control means may display an icon on the display means to notify that the keyword is included in the data broadcast.

  The control means may display a page obtained when transitioning from the first page of the data broadcast to the keyword page in order.

  The screen display method according to the second aspect of the present invention searches for a keyword registered in advance in a data broadcast performed by the received digital broadcast, and when the keyword is included in the data broadcast, A message is displayed.

  In the screen display method, the content of the data broadcast including the keyword may be displayed together with the digital broadcast video.

In the screen display method, a page including the keyword may be displayed on a data broadcast screen together with a digital broadcast video.
In the screen display method, a part of a page including the keyword may be displayed over a digital broadcast video.

  In the screen display method, when the keyword is included in the data broadcast, an icon indicating that the keyword is included in the data broadcast may be displayed.

  In the screen display method, a page obtained when the transition from the initial page of the data broadcast to the keyword page is sequentially performed may be displayed.

  According to the present invention, it is possible to comfortably browse a data broadcast performed by digital broadcasting.

  Hereinafter, two embodiments of the present invention will be described with reference to the drawings.

<First Embodiment>

  FIG. 1 is a diagram showing an example of the configuration of a digital broadcast receiving apparatus according to the first embodiment of the present invention, in a case where the present invention is applied to a wireless communication terminal equipped with a telephone function and a digital broadcast receiving function. An example is shown.

  Before describing the digital broadcast receiving apparatus shown in FIG. 1, an outline of data broadcasting performed by digital broadcasting in the present embodiment will be described first.

  In this embodiment, data provided by data broadcasting includes a BML (broadcast markup language) document in which information related to screen display of data broadcasting is described, and characters and images (still images, images) referred to by the BML document. Video) data.

  BML is a content description language in which a document description language called XML (extensible markup language) is extended for digital broadcasting. The BML document described in the present embodiment is a document described by this BML.

In data broadcasting, data of the same content is transmitted at a constant cycle by a carousel transmission method.
A data broadcast carousel includes information called DII (download information indication) and a data body called a module.
The DII describes information related to the contents of the carousel. For example, information related to the carousel version and the data body is described.
The module is divided and stored in fixed-length blocks called DDB (download data block), and data is transmitted in units of blocks. The module includes data such as characters and images referred to by the BML document and the BML document. In normal data broadcasting, a plurality of carousels having different contents are provided together, and each is associated with one ES (elementary stream).

  The above is described in ARIB (association of radio industries and businesses) standard 'ARIB STD-B24' and ARIB technical data 'ARIB-TR B14'.

  When receiving and reproducing data broadcast, first, one carousel is selected from a plurality of carousels and received. Then, a specific BML document in a module included in the received carousel is analyzed, and a data broadcast screen is configured by combining characters, figures, symbols, images, and the like according to the analysis result.

  The content of data broadcasting is usually composed of a plurality of hierarchized pages, and the content of the first page is described in a specific BML document called a startup document. The display of data broadcasting generally begins with a startup document.

  There are two types of data broadcasting: a real-time system that provides information in conjunction with the program being broadcast, and can be viewed only while the program is broadcast, and can be viewed at any time by storing data in the receiver. There are two storage methods that can be done.

  The outline of the data broadcasting in this embodiment has been described above.

As shown in FIG. 1, for example, the digital broadcast receiving apparatus according to this embodiment includes an antenna 101 for receiving digital broadcast, a tuner unit 102, a demodulation unit 103, an audio decoder unit 104, a video decoder unit 105, Data broadcasting decoder unit 106, screen generation unit 108, audio output unit 107, display unit 109, light emitting unit 110, vibration unit 111, mobile phone antenna 112, telephone unit 113, memory 114, And a system control unit 116.
A unit including the tuner unit 102 and the demodulation unit 103 is an embodiment of the receiving means of the present invention.
The display unit 109 is an embodiment of the display means of the present invention.

  The tuner unit 102 tunes to a signal component of a predetermined frequency selected according to a broadcast channel designation command from the system control unit 116 out of signal components included in the radio wave received by the antenna 101, and converts the received signal of the digital broadcast. Generate. The received signal is subjected to signal processing such as amplification, detection, frequency conversion, etc., converted into a digital signal and output.

  The demodulator 103 performs predetermined demodulation processing on the reception signal output from the tuner unit 102 to generate an MPEG transport stream. Then, according to the packet ID in the transport stream, the audio packet, the video packet, and the data broadcast packet are separated and output.

  The audio decoder unit 104 inputs the audio packet separated by the demodulator 103 and performs a predetermined decoding process.

  The audio output unit 107 includes, for example, a speaker, and generates and outputs audio based on the audio data decoded by the audio decoder unit 104.

  The video decoder unit 105 inputs the video packet separated by the demodulator 103 and performs a predetermined decoding process.

  The screen generation unit 108 combines the television broadcast video data decoded by the video decoder unit 105 and the data broadcast data decoded by the data broadcast decoder unit 106 under the control of the system control unit 116 and displays them. Data to be displayed on the screen of the unit 109 is generated.

  The display unit 109 includes a display device such as a liquid crystal display device or an organic EL display device, and displays a screen corresponding to data supplied from the screen generation unit 108.

  The data broadcast decoder unit 106 receives the data broadcast packet separated by the demodulation unit 103 and performs a predetermined decoding process.

FIG. 2 is a diagram illustrating an example of the configuration of the data broadcast decoder unit 106.
For example, as shown in FIG. 2, the data broadcast decoder unit 106 includes a BML control unit 201, a BML parsing unit 202, and a script processing unit 203.

The BML parsing unit 202 acquires and analyzes a BML document from the data broadcast packet separated in the demodulation unit 103, and outputs the analysis result as a DOM (document object model) object 205. The DOM object 205 is internal data and includes information on the structure and element data of the analyzed BML document.
Further, the BML parsing unit 202 extracts a script described in a predetermined language such as ECMAscript included in the BML document, and outputs the script to the script processing unit 203.

  The script processing unit 203 analyzes the script output from the BML parsing unit 202 and generates an executable script object 206. The script object 206 is internal data, and includes a command relating to a dynamic change of the BML document related to screen display.

  The BML control unit 201 performs processing such as focus movement and screen transition based on the key event sent from the system control unit 116.

  The BML drawing unit 204 creates data to be displayed on the screen of the display unit 109 based on the DOM object 205 output from the BML parsing unit 202.

Returning to FIG.
The telephone unit 113 is a unit that controls a function as a wireless communication device. For example, a communication circuit for performing wireless communication with a base station of the wireless communication device network through the antenna 112, a microphone and an ear speaker for voice communication, and voice communication And a processor for executing call processing according to a predetermined protocol.

  The memory 114 stores temporary data used for processing of the system control unit 116, constant data, and the like.

  For example, the memory 114 includes a keyword storage unit 115 that stores keywords with high viewer interest. In the keyword storage unit 115, for example, a keyword desired by the viewer is stored when the viewer performs a predetermined registration operation in a key input unit (not shown).

  The light emitting unit 110 has a light emitting element such as a light emitting diode, for example, and changes the light emitting state according to the control of the system control unit 116 to perform various notifications to the viewer.

  The vibration unit 111 includes, for example, a vibration motor and performs various notifications to the viewer by vibrating according to the control of the system control unit 116.

  The system control unit 116 controls the overall operation of the digital broadcast receiving apparatus. That is, a tuning operation in the tuner unit 102, a demodulation operation in the demodulation unit 103, a decoding operation in each decoder unit (104, 105, 106), an audio output operation in the audio output unit 107, and a screen display in the screen generation unit 108 The data generation operation, the display operation on the display unit 109, the light emission operation on the light emitting unit 110, the vibration operation on the vibration unit 111, the call operation on the telephone unit 113, and the like are controlled in accordance with a predetermined procedure. Control.

  The system control unit 116 includes a display control unit 117 and a keyword search unit 118 as processing units related to screen display of data broadcasting.

  The keyword search unit 118 searches for a document including a keyword registered in the keyword storage unit 115 of the memory 114 from a series of BML documents included in the data broadcast signal demodulated by the demodulation unit 103.

  When the keyword search unit 118 searches for a BML document including a keyword, the display control unit 117 outputs a data broadcast screen generated based on the BML document via the demodulation unit 103 and the video decoder unit 105. The image is displayed on the display unit 109 so as to be superimposed on the television broadcast screen generated by the video signal. That is, the display control unit 117 displays the video decoder unit 105, the data broadcast decoder unit 106, and the screen so that a screen obtained by combining the data broadcast screen including the keyword and the television broadcast screen is displayed on the display unit 109. The generation unit 108 is controlled.

  Here, the operation of receiving and displaying the data broadcast in the digital broadcast receiving apparatus shown in FIG. 1 having the above-described configuration will be described with reference to the flowchart of FIG.

The system control unit 116 controls the tuner unit 102 and the demodulation unit 103 to receive digital broadcasts, separates digital broadcast video packets, audio packets, and data broadcast packets from the received signals, and respectively decodes the corresponding decoding units ( 104, 105, 106) (step S10).
When the data broadcast carousel is output as a packet from the demodulation unit 103, the data broadcast decoder unit 106 extracts data such as a BML document or image data included in the DDB of the carousel and stores it in the memory 114. .

  When reception of the digital broadcast starts, the keyword search unit 118 monitors the memory 114 and confirms whether the BML document extracted by the data broadcast decoder unit 106 is stored in the memory 114 (step S11).

  When the BML document is stored in the memory 114, the keyword search unit 118 checks whether a keyword is registered in the keyword storage unit 115 of the memory 114 (step S12).

If no keyword is registered in the keyword storage unit 115, the display control unit 117, for example, displays the screen of the startup document in the BML document stored in the memory 114 when the user performs a data broadcast display operation. And is displayed on the display unit 109 (step S19).
On the other hand, if a keyword is registered in the keyword storage unit 115, the keyword search unit 118 acquires the keyword from the keyword storage unit 115 (step S13), and matches the keyword from the BML document stored in the memory 114. The character string to be searched is searched (step S14). This keyword search is executed in the background, for example, and the viewer is not notified that the search is in progress.

  When the keyword search unit 118 finishes searching for one BML document, the keyword search unit 118 stores the search result in the memory 114 (step S15). For example, when a keyword is found in a BML document, information such as the document name and the keyword position in the document is stored.

  Next, the keyword search unit 118 checks whether or not a BML document that has not been searched still remains in the memory 114 (step S16). If BML documents that have not been searched still remain, the keyword search unit 118 repeats the processes of steps S14 to S16 until the search for all BML documents is completed.

  When the keyword search unit 118 finishes searching for all BML documents, the display control unit 117 confirms the search result stored in the memory 114 in step S15 (step S17).

When a BML document including a character string that matches the keyword is found, the display control unit 117 displays the screen of the BML document on the display unit 109 together with the television broadcast screen (step S18).
On the other hand, when a BML document including a character string that matches the keyword is not found, the display control unit 117 selects a startup document from among the BML documents stored in the memory 114 when the user performs a data broadcast display operation, for example. The selected screen is displayed on the display unit 109 together with the television broadcast screen (step S19).

  If the page to be displayed in step S18 is not the first page of the data broadcast generated by the startup document, the display control unit 117 displays in an easy-to-understand manner to the viewer that the page being displayed is not the first page. In addition, a display that allows easy transition from the currently displayed page to the first page is performed. For example, a link for transitioning to the top page is displayed in the data broadcast display area.

  Next, specific examples of screen display in the display unit 109 will be described with reference to FIGS.

FIG. 4 shows three BML documents' a. bml ',' b. cml ',' c. It is the figure which illustrated the example of the screen 301,302,303 of the data broadcasting produced | generated based on bml '.
BML document 'a. bml ′ is a start-up document and corresponds to the first page of data broadcasting. The content of the data broadcast has a structure that transitions from the first page generated based on the startup document to the page generated based on the other BML document.
BML document 'b. bml ′ corresponds to a page that is changed by selecting the item “sports” displayed on the page of the startup document.
BML document 'c. bml 'is a BML document' b. Corresponding to the page that is changed by selecting the item “Professional baseball” displayed on the bml ′ page.

FIG. 5 is a diagram illustrating an example of a screen of the display unit 109 when a BML document including a keyword is found by the search of the keyword search unit 118.
For example, the registered keyword is “major league”, and a character string matching the keyword is BML document 'c. Suppose it is found in bml '. In this case, as shown in FIG. 5, for example, a BML document 'c. The bml ′ screen (data broadcast screen) is displayed. Then, in order to make it easy for viewers to understand the portion with the keyword “major league”, the BML document 'c. The bml 'screen is scrolled in advance.

In order to make it easy for the viewer to understand the keyword part, the display control unit 117 may perform display as shown in FIG. 6, for example.
In the example of FIG. 6, the display control unit 117 displays the BML document “c. A sentence 601 including “major league” in bml ′ is displayed superimposed on a television broadcast image without displaying a data broadcast screen. For example, as shown in FIG. 6, a sentence 601 is displayed at a position that does not obstruct the viewing of the television, such as the lower part of the video display area of the television.
The keyword may be displayed in units of sentences as shown in the example of FIG. 6 or may be displayed in units of paragraphs including a plurality of sentences. A sentence or paragraph including a keyword may be displayed in its entirety, or a part of a sentence or a paragraph including a keyword may be displayed when the number of characters to be displayed is limited. .

  FIG. 7 is a diagram illustrating an example of a screen of the display unit 109 when a BML document including a character string that matches a keyword is not found. In this case, the startup document ‘a. The first page of the data broadcast corresponding to bml 'is displayed at the bottom of the television broadcast screen.

  If a BML document including a character string that matches the keyword is not found, the display control unit 117 does not display any BML document including the startup document unless there is a data broadcast display operation from the user, for example. An operation mode may be provided. As a result, even when the data broadcast is received or updated, the data broadcast screen that does not include the keyword is not displayed at all, and the television viewing is not hindered.

As described above, according to the digital broadcast receiving apparatus according to the present embodiment, a document including a predetermined keyword is searched from a series of BML documents included in the received data broadcast signal. If a document including a keyword is found as a result of this search, the contents of the data broadcast generated based on the document are displayed together with the digital broadcast video.
As a result, the screen of the BML document including a specific keyword is automatically selected and displayed from the series of BML documents sent by data broadcasting. Even when only John broadcast is viewed, it is possible to reduce the disadvantage that the viewer misses useful information of the data broadcast.

The content of data broadcasting is composed of a plurality of hierarchized pages, and has a structure that transitions to another page by selecting a link displayed on each page. Therefore, in the method of always starting the display from the first page of data broadcasting, when there are many links or when there are many pages, the viewer can select the link many times to obtain the desired information. The transition must be made and the operation is very troublesome.
According to the digital broadcast receiving apparatus according to the present embodiment, when a BML document including a specific keyword is found by search, the screen of the BML document is displayed first, so that the viewer does not have to perform troublesome operations. You can immediately watch the pages you are interested in.

Further, in the method of notifying the viewer of the fact every time the content of the data broadcast is updated and prompting the display of the data broadcast, whether or not the information necessary for the viewer is included in the updated content is determined in advance. Since there is no way to know, it is often useless to display a data broadcast screen for each notification. For this reason, if the notification is ignored and the data broadcast screen is not displayed at all, the useful information of the data broadcast is missed, and the convenience is impaired. On the other hand, if the data broadcast screen is displayed every time an update is notified, there is a disadvantage that it is difficult to concentrate on a digital broadcast program.
According to the digital broadcast receiving apparatus according to the present embodiment, when a BML document including a registered keyword is found, at least a part of a page or paragraph including the keyword in the BML document is displayed on the display unit 109. Thus, the viewer can check an important part of the content without performing a display operation on the data broadcast screen. Furthermore, if a method of simply displaying keywords, sentences or paragraphs including keywords without displaying the data broadcasting screen, it becomes easier to grasp the content and whether the data broadcasting screen is displayed. It becomes possible to judge exactly. For example, even when a character string used in a context different from the context assumed in advance coincides with a keyword, it can be easily determined by reading a sentence or paragraph including the keyword.

By the way, in the BML document, the character string display mode on the screen is specified by surrounding the character string to be displayed with a predetermined element. For example, in the element “title”, <title> AAAA </ title>;
By enclosing the character string 'AAAAA', the character string 'AAAAA' is displayed as the page title. When a character string is surrounded by a plurality of elements, the display mode of the character string is determined according to the specified combination of each element.

Therefore, in the digital broadcast receiving apparatus according to the present embodiment, the data broadcast screen display can be changed according to the description of the display mode as described above for the keyword found by the search.
That is, the above-described display control unit 117 may change the screen display of the data broadcast on the display unit 109 according to the description regarding the display mode of the keyword in the BML document including the keyword.

For example, the display control unit 117 gives predetermined weights to the above-described elements that specify the display mode. For example, a large weight is set for an element having a high degree of display emphasis on the screen, such as an element indicating a document title or heading, an element designating a large font size, or an element designating a conspicuous color. When the keyword search unit 118 finds a BML document including the keyword, the display control unit 117 extracts elements surrounding the keyword and calculates the sum of the weights. The total value of the calculated weights is a numerical value of the degree of keyword emphasis on the screen, and represents the importance of the keyword in the content of data broadcasting.
The display control unit 117 changes the display mode of the data broadcast on the display unit 109 according to, for example, the total value of the weights.

For example, when the total weight value exceeds a predetermined threshold, the display control unit 117 displays a data broadcast screen generated based on the BML document including the keyword on the display unit 109 together with the television broadcast screen. (For example, FIG. 5). In this case, since the data broadcast screen including the keyword is displayed in the display area of the display unit 109, the television broadcast is displayed on a relatively small screen.
On the other hand, if the total value does not exceed the predetermined threshold value, the display control unit 117 does not display the data broadcast on the screen, but instead finds a document including a keyword in the received series of BML documents. A predetermined notification indicating this is displayed on the display unit 109. For example, a predetermined icon indicating that a document including the keyword is found is displayed in a predetermined pictogram area on the screen. In this case, since the data broadcast screen is not displayed in the display area of the display unit 109, the television broadcast is displayed on a relatively large screen.
In this way, when the total weight is large (that is, the degree of keyword emphasis on the screen is high), the data broadcast screen including the keyword is displayed on the display unit 109. The page can be accurately selected and displayed on the display unit 109. In addition, in order to notify the viewer of the presence of the BML document using an icon or the like instead of displaying the BML document that is estimated to be low in importance from the description of the display mode of the one containing the keyword, The display of content that is less important to the viewer is suppressed, and the television can be viewed more comfortably.

Further, the display control unit 117 displays a data broadcast screen generated based on the document including the keyword on the display unit 109 (for example, FIG. 5), or at least a sentence or paragraph including the keyword in the document. The selection of whether to display a part on the display unit 109 (for example, FIG. 6) may be performed according to the description of the display mode of the keyword in the BML document.
For example, when the above-described total weight value exceeds a predetermined threshold value, the display control unit 117 displays a data broadcast screen generated based on the BML document including the keyword on the display unit 109 (FIG. 5). When the total weight value does not exceed the predetermined threshold value, at least a part of the sentence or paragraph including the keyword is displayed on the display unit 109 (FIG. 6).
In this way, when the total weight is large (that is, the degree of keyword emphasis on the screen is high), the data broadcast screen including the keyword is displayed on the display unit 109. The page can be accurately selected and displayed on the display unit 109. In addition, BML documents that contain keywords but are estimated to be less important from the description of the display mode are displayed with sentences and paragraphs containing the keywords instead of displaying them, so the importance is low for the viewer. The display of content is suppressed, and it becomes possible to view digital broadcast programs more comfortably. Further, since an important part including a keyword can be easily confirmed, it is possible to accurately determine whether or not the content of data broadcasting is useful before displaying the screen.

<Second Embodiment>
Next, a second embodiment of the present invention will be described.

  In the digital broadcast receiving apparatus according to the first embodiment, when a BML document including a predetermined keyword is found, a screen generated based on the BML document is displayed on the display unit 109. However, with this method, there are cases where the screen as intended by the creator of the data broadcast cannot be displayed accurately. An example in which correct display is not performed will be described with reference to FIGS.

  FIG. 8 shows an example of a BML document and image data provided by data broadcasting. FIG. 9 shows an example of a data broadcast screen composed of the BML document and image data shown in FIG.

  '901' is a data broadcasting startup document 'x. The screen produced | generated based on bml 'is shown. When a prefecture name on this screen is selected, a transition is made to a weather forecast screen for that region as shown in FIG.

  '902' is a BML document 'y. The screen produced | generated based on bml 'is shown. BML document 'y. In bml ′, a script A for reading a weather map from the image data 904 to 906 and a script B for reading weather information from the BML document 903 are described. By executing these scripts A and B, FIG. A screen as shown in FIG. Scripts A and B are startup documents' x. bml 'screen 902, the BML document' z. Necessary data is read from mbl 'and image data 904 to 906 to construct a weather forecast screen.

  '903' is a BML document 'z. The screen produced | generated based on bml 'is shown. BML document 'z. In bml ', weather information of each region (for example, each prefecture) is described, and the weather information can be extracted for each region (for example, each prefecture) in accordance with the command of the script B described above. BML document 'z. bml 'is a document that is not normally displayed to the viewer.

Image data 904 to 906 is image data of a weather map of each region (for example, each prefecture).
The weather map 1002 in FIG. 9 displays the image data read by the script A. For example, when “Kanagawa” is selected on the screen 901 and the screen transitions to the screen 902, an image of the image data 905 is displayed on the screen 902.
The character string 1003 in FIG. 9 is a BML document 'z. bml 'weather information is displayed.

  For example, if the keyword is “Kanagawa” and the BML document shown in FIG. 9 is processed by the digital broadcast receiving apparatus according to the first embodiment described above, this keyword is stored in the BML document ‘z. Since it is included in bml ', the screen 903 is displayed as a data broadcast screen. If the contents of the data broadcast that should be displayed as shown in FIG. 9 are displayed as shown on the screen 903, the viewer cannot view all necessary information.

  Therefore, in the digital broadcast receiving apparatus according to the present embodiment, it is referred to when transitioning from the initial page of data broadcasting to a page generated based on a BML document including a keyword (hereinafter simply referred to as a keyword page). A path of a series of documents is analyzed, and a screen of a keyword page obtained when a transition is made sequentially from the first page to the keyword page along this path is generated. As a result, a screen as intended by the producer is displayed.

FIG. 10 is a diagram illustrating an example of the configuration of the digital broadcast receiving apparatus according to the present embodiment, where the same reference numerals in FIGS. 1 and 10 indicate the same components.
The digital broadcast receiving apparatus shown in FIG. 10 is obtained by replacing the control unit 116 in the digital broadcast receiving apparatus shown in FIG. 1 with a control unit 116A, and the other configuration is the same as that of the digital broadcast receiving apparatus shown in FIG. .

The control unit 116A includes a display control unit 117A, a keyword search unit 118, and a route analysis unit 119 as processing units related to data broadcast screen display.
Since the keyword search unit 118 is the same as the unit having the same reference numeral in FIG. 1 described above, a description thereof will be omitted. Here, the display control unit 117A and the route analysis unit 119 will be described.

  When the keyword search unit 118 finds a BML document including a keyword, the path analysis unit 119 analyzes a series of BML document paths that are referred to when transitioning from the first page of the data broadcast to the page of the keyword.

For example, the path analysis unit 119 analyzes another document that does not include the keyword, and an element or event that transitions to the document that includes the keyword (the event here refers to a script described in a predetermined language such as ECMAScript). ) When a BML document in which such elements and events are described is found, the path analysis unit 119 stores the document name, corresponding element, and event position information in the memory 114. Then, a further BML document in which an element or event for transition to the found BML document is described is searched. The path analysis unit 119 repeats such a search until it reaches the startup document.
When a plurality of routes are found, the route analysis unit 119 selects a route having the smallest number of transitions or event executions, for example.

The BLM document 'x. bml '-' x. The operation of the route analysis unit 119 will be described using bml ′ as an example.
The keyword search unit 118 searches for the keyword “Kanagawa Prefecture”, and a character string that matches the keyword “Kanagawa Prefecture” is displayed in the BML document 'z. bml ′, the path analysis unit 119 detects the BML document “z. A BML document in which an element or event transitioning to bml ′ is described is searched. In the example of FIG. 8, the BML document “y. bml 'script B causes BML document' z. bml 'is read, the path analysis unit 119 reads the BML document' y. The document name of bml ′ and the position of the script B are stored in the memory 114.
Next, the path analysis unit 119 displays the BML document “y. A BML document in which an element or event transitioning to bml ′ is described is searched. In the example of FIG. 8, the BML document “x. bml 'to BML document' y. bml ′, the path analysis unit 119 changes the BML document “x. The document name bml ′ and the position of the corresponding part are stored in the memory 114. BML document 'x. Since bml ′ is a startup document, the route analysis unit 119 does not perform any further route search.
Thus, the startup document 'x. BML document 'z. The path to bml 'is analyzed.

  When the keyword search unit 118 searches for a BML document including a keyword, the display control unit 117A displays the keyword obtained when the keyword is sequentially shifted from the first page to the keyword page along the route analyzed by the route analysis unit 119. A screen of the page is generated, and this screen is displayed on the display unit 109 together with the digital broadcast video. That is, the page transition is performed in order from the startup document along the path analyzed by the path analysis unit 119, and if there is an event in the process, this is executed. Thereby, the screen of the keyword page generated by the display control unit 117A becomes a screen as intended by the creator of the data broadcast.

  Next, the operation of receiving and displaying the data broadcast in the digital broadcast receiving apparatus shown in FIG. 10 having the above-described configuration will be described with reference to the flowchart of FIG.

The system control unit 116A controls the tuner unit 102 and the demodulating unit 103 to receive digital broadcasts, separates digital broadcast video packets, audio packets, and data broadcast packets from the received signals, and respectively corresponding decoding units ( 104, 105, 106) (step S30).
When the data broadcast carousel is output from the demodulator 103 as a packet, the data broadcast decoder 106 extracts the BML document and image data included in the carousel DDB, and stores them in the memory 114.

  When reception of the digital broadcast starts, the keyword search unit 118 monitors the memory 114 to check whether the BML document extracted by the data broadcast decoder unit 106 is stored in the memory 114 (step S31).

  When the BML document is stored in the memory 114, the keyword search unit 118 checks whether a keyword is registered in the keyword storage unit 115 of the memory 114 (step S32).

When no keyword is registered in the keyword storage unit 115, for example, when a user performs a data broadcast display operation, the display control unit 117 </ b> A displays the screen of the startup document in the BML document stored in the memory 114 as a television broadcast. And is displayed on the display unit 109 (step S41).
On the other hand, if a keyword is registered in the keyword storage unit 115, the keyword search unit 118 acquires the keyword from the keyword storage unit 115 (step S33), and matches the keyword from the BML document stored in the memory 114. The character string to be searched is searched (step S34). This keyword search is executed in the background, for example, and the viewer is not notified that the search is being performed.

  When the keyword search unit 118 finishes searching for one BML document, the keyword search unit 118 stores the search result in the memory 114 (step S35). For example, when a keyword is found in a BML document, information such as the document name and the keyword position in the document is stored.

  Next, the keyword search unit 118 checks whether or not a BML document that has not yet been searched remains in the memory 114 (step S36). When BML documents that have not been searched still remain, the keyword search unit 118 repeats the processes of steps S34 to S36 until the search of all the BML documents is completed.

When the keyword search unit 118 finishes searching all the BML documents, the display control unit 117A checks the search result stored in the memory 114 in step S15 (step S37).
When a BML document including a character string that matches the keyword is found, the path analysis unit 119 analyzes a path of a series of BML documents that are referred to when transitioning from the first page to the keyword page (step S38). .
On the other hand, if a BML document including a character string that matches the keyword is not found, for example, if a user performs a data broadcast display operation, the display control unit 117A selects a startup document from among the BML documents stored in the memory 114. The selected screen is displayed on the display unit 109 together with the digital broadcast program screen (step S41).

  When the route analysis is performed in step S38, the display control unit 117A sequentially changes from the opening page to the keyword page by, for example, performing page transitions and event execution along the route analyzed by the route analysis unit 119. A keyword page screen obtained when the transition is made is generated (step S39). Then, the generated data broadcast screen is displayed on the display unit 109 together with the digital broadcast video (step S40).

As described above, according to the digital broadcast receiving apparatus according to the present embodiment, a path of a series of documents referred to when a transition from the first page of data broadcasting to the keyword page is analyzed. Then, a screen obtained when transitioning from the first page to the keyword page in order along the analyzed path is generated as a screen for the keyword page, and is displayed on the display unit 109 together with the digital broadcast video.
Therefore, even if an event is executed from the startup document to the BML document including the keyword, a screen as intended by the creator of the data broadcast can be generated. Can watch.

  As mentioned above, although some embodiment of this invention was described, this invention is not limited only to said form, Various modifications are included.

  For example, the telephone function may be wired or wireless, or may not be provided if not necessary.

In the digital broadcast receiving apparatus described above, when a data broadcast document including a keyword is found, an example of displaying a screen generated based on the document is given, but the present invention is not limited to this. The digital broadcast receiving apparatus according to the present invention may notify the viewer when a data broadcast document including a keyword is found.
For example, in the digital broadcast receiving apparatus shown in FIG. 1, the system control unit 116 finds a data broadcast document including a keyword by changing the light emission state of the light emitting unit 110 or vibrating the vibration unit 111. This may be notified to the viewer.
In this case, the display control unit 116 is generated based on a document including a keyword when an instruction to display a data broadcast screen is given by, for example, a viewer's key operation on a key input unit (not shown). The screen (contents) may be displayed on the display unit 109 together with the digital broadcast video.
In this way, by notifying the viewer that a data broadcast document including a predetermined keyword has been received, the viewer can view a highly interested data broadcast at the viewer's timing. . Also, compared with the case where data broadcasting is always displayed, television broadcasting can be comfortably viewed on a wide screen.

Furthermore, the digital broadcast receiving apparatus according to the present invention may change a notification mode when a data broadcast document including a keyword is found according to a display mode of the keyword described in the document on the screen. good. For example, by changing the intensity of light emission, the blinking cycle, the vibration pattern, etc. according to the total weight value described above, the viewer can grasp the difference in the display mode of the keyword on the data broadcasting screen. Also good.
This makes it possible to accurately determine whether or not the data broadcast content including the keyword is useful before displaying the screen.

  Also, an embodiment is described in which the content of a data broadcast including a keyword is displayed together with a digital broadcast video in consideration of the screen size of the apparatus or in consideration of the use state of the viewer (the viewer's viewing is not interrupted). However, the display may be switched from the digital broadcast display to the data broadcast display automatically or in accordance with the operation of the viewer.

  All of the processing of the control unit 116 may be executed by hardware, or at least a part thereof may be executed by a computer based on a program.

  The digital broadcast receiving apparatus of the present invention is not limited to the one having the mobile phone function as shown in the above-described embodiment. For example, the present invention can be widely applied to devices that can be equipped with a digital broadcast receiving function, such as PDA (personal digital assistants), portable game machines, fixed (for example, home use) receivers, car navigation systems, and electronic book terminals. is there. That is, the present invention can be widely applied to digital broadcast receivers as well as portable devices.

It is a figure which shows an example of a structure of the digital broadcast receiver which concerns on 1st Embodiment. It is a figure which shows an example of a structure of a data broadcast decoder part. It is a flowchart for demonstrating operation | movement of the digital broadcast receiver which concerns on 1st Embodiment. It is the figure which illustrated an example of the screen produced | generated based on a BML document. It is a figure which shows an example of the screen displayed when the BML document containing a keyword is found by the search of a keyword search part. It is a figure which shows the other example of the screen displayed when the BML document containing a keyword is found by the search of a keyword search part. It is a figure which shows an example of the screen displayed when the BML document containing the character string which matches a keyword is not found. It is a figure which shows an example of the BML document provided by data broadcasting, and image data. 9 shows an example of a data broadcast screen composed of the BML document and image data shown in FIG. It is a figure which shows an example of a structure of the digital broadcast receiver which concerns on 2nd Embodiment. It is a flowchart for demonstrating operation | movement of the digital broadcast receiver which concerns on 2nd Embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 101,112 ... Antenna, 102 ... Tuner part, 103 ... Demodulator part, 104 ... Audio decoder part, 105 ... Video decoder part, 106 ... Data broadcast decoder part, 107 ... Audio output part, 108 ... Screen generation part, 109 ... Display 110, light emitting unit, 111 ... vibration unit, 113 ... telephone unit, 114 ... memory, 116, 116A ... system control unit, 117, 117A ... display control unit, 118 ... keyword search unit, 119 ... route analysis unit, 201 ... BML control unit, 202 ... BML parsing unit, 203 ... Script processing unit

Claims (13)

Registration means for registering keywords;
Receiving means for receiving digital broadcasting;
A search is performed to determine whether or not a keyword registered in the registration unit is included in a data broadcast performed by the digital broadcast received by the reception unit, and if the keyword is included in the data broadcast, notification to that effect is performed. A digital broadcast receiving apparatus comprising: a control means; The digital broadcast receiving apparatus according to claim 1, wherein the control means displays data broadcast content including the keyword together with a digital broadcast video. The digital broadcast receiver according to claim 2, wherein the control means displays a page including the keyword on a data broadcast screen together with a digital broadcast video. The digital broadcast receiving apparatus according to claim 2, wherein the control means displays a part of a page including the keyword superimposed on a digital broadcast video. The digital broadcast receiving apparatus according to claim 1, wherein the control means notifies that the keyword is included in the data broadcast by a light emitting means or a vibration means. The digital broadcast receiving apparatus according to claim 1, wherein the control means displays an icon on a display means to notify that the keyword is included in a data broadcast. The digital broadcast receiving apparatus according to claim 1, wherein the control means displays a page obtained when a transition is made in order from the initial page of the data broadcast to the keyword page. Search for data keywords that are received by digital broadcasts that contain pre-registered keywords,
A screen display method for displaying when the keyword is included in the data broadcast. The screen display method according to claim 8, wherein the content of the data broadcast including the keyword is displayed together with a digital broadcast video. The screen display method according to claim 9, wherein a page including the keyword is displayed together with a digital broadcast video on a data broadcast screen. The screen display method according to claim 9, wherein a part of a page including the keyword is displayed so as to be superimposed on a digital broadcast video. The screen display method according to claim 8, wherein when the keyword is included in a data broadcast, an icon indicating that the keyword is included in the data broadcast is displayed. The screen display method according to claim 8, wherein a page obtained when a transition is made in order from the first page of data broadcasting to the page of the keyword is displayed.

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